Ribbon cartridge



FIG. 1 is a perspective view of a ribbon cartridge showing my new design;

FIG. 2 is a front elevation thereof;

FIG. 3 is a bottom plan view thereof; and

FIG. 4 is a right end view thereof.

The broken lines in FIGS. 1 and 3 of the drawings are for illustrative purposes only. 

The ornamental design for a ribbon cartridge, as shown and described. 